PHP - search in array and create new one

Question

I want to avoid if it is possible foreach combined with if. I want to search the array, take out the matches and create new one base on result.

In this example I want to create separate arrays for each os -

$os1 = $array;
$os2 = $array...

Array looks like this:

    $array = [
            0 => [
                'id'   => 1,
                'name' => 'name',
                'os'   => 1
            ],
            1 => [
                'id'   => 2,
                'name' => 'name',
                'os'   => 1
            ],
            2 => [
                'id'   => 3,
                'name' => 'name',
                'os'   => 2
            ],
            3 => [
                'id'   => 3,
                'name' => 'name',
                'os'   => 2             
            ]
    ];

why do you want to avoid foreach? - also try to re-write your question without using 'for each' ;) — user3012759
– user3012759, Commented Mar 13, 2015 at 13:42

Philipp · Accepted Answer · 2015-03-13 13:53:52Z

2

Use array_filter to reduce the input array to the expected result

$os = 1;
$data = array_filter($array, function($item) use ($os) {
    return $item['os'] == $os;
});

answered Mar 13, 2015 at 13:53

Philipp

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Comments

Christian Gollhardt · Accepted Answer · 2015-03-13 14:08:25Z

The short one

$os1 = [];
$os2 = [];
$os3 = [];

foreach ($array as $item) {
    ${'os' . $item['os']}[] = array('id' => $item['id'], 'name' => $item[$name];
}

The better one

$os1 = [];
$os2 = [];
$os3 = [];

foreach ($array as $item) {
    switch($item['os']) {
        case 1:
            $os1[] = array('id' => $item['id'], 'name' => $item[$name]);
            break;
        case 2:
            $os2[] = array('id' => $item['id'], 'name' => $item[$name]);
            break;
        case 3:
            $os3[] = array('id' => $item['id'], 'name' => $item[$name]);
            break;
        default:
            throw new Exception('Unknown Os');
    }
}

Also you maybe want to assign array($item['id'] => $item[$name]); instead of array('id' => $item['id'], 'name' => $item[$name]);

$os1 = [];
$os2 = [];
$os3 = [];

foreach ($array as $item) {
    ${'os' . $item['os']}[] = array($item['id'] => $item[$name]);
}

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